Clear aerosol hair spray formulations containing a linear sulfopolyester in a hydroalcoholic liquid vehicle

Abstract

This invention relates to an aerosol hair spray formulation containing 0.5 to 15 weight percent of a water-dispersible or water-dissipatible, linear sulfopolyester having a Tg of 40° C. to 50° C. and an inherent viscosity of 0.24 to 0.60 dl/g which contains repeat units from 20 to 26 mole percent dimethyl-5-sodiosulfoisophthalate and 74 to 80 mole percent isophthalic acid, based on 100 mole percent dicarboxylic acid; 10 to 30 mole percent 1,4-cyclohexanedimethanol and 70 to 90 mole percent diethylene glycol, based on 100 mole percent diol; and up to 60 weight percent of an alcohol. The aerosol hair spray formulations are clear, have improved dry time and curl retention, and exhibit less than 20 NTU's, which is a measure of turbidity, even at high concentrations of alcohol.

What is claimed is: 
     
       1. A clear aerosol hair spray formulation exhibiting less than 20 NTU's and having a volatile organic content that does not exceed 60 weight percent, wherein the formulation consists essentially of the following ingredients: (1) 0.5 to 15 weight percent of a linear sulfopolyester having a Tg of 40° C. to 50° C. and an inherent viscosity of 0.24 to 0.60 dl/g congaining repeat units consisting essentially of the reaction product of 20 to 26 mole percent dimethyl-5-sodiosulfoisophthalate and 74 to 80 mole percent isophthalic acid, based on 100 mole percent of the dimethyl-5-sodiosulfoisophthalate and isophthalic acid, and 10 to 30 mole percent 1,4-cyclohexanedimethanol and 70 to 90 mole percent diethylene glycol, based on 100 mole percent of the 1,4-cyclohexanedimethanol and diethylene glycol;   (2) a water/alcohol liquid vehicle wherein the alcohol is an aliphatic straight or branched chain monohydric alcohol having 2 to 4 carbon atoms;   (3) 3 to 40 weight percent based on the weight of ingredients (1), (2), (3) and (4) of a propellant selected from the group consisting of methane, ethane, propane, butane, trichlorofluoromethane, dichlorodifluoromethane, dichlorotetrafluoroethane, monochlorodifluoromethane, trichlorotrifluoroethane, 1,1-difluoroethane, carbon dioxide, nitrous oxide, nitrogen, helium, dimethyl ether, fluorinated oxepane, fluorinated oxetane, and mixtures thereof; and   (4) 0.5 to 10 weight percent based on the weight of ingredients (1), (2), (3) and (4) of a water-soluble polymer having a weight average molecular weight of 1,000 to 100,000, which is prepared from at least one vinyl monomer selected from the group consisting of alkyl vinyl ethers, alkyl acrylates, vinyl esters, n-vinyl lactams, alkyl acrylamides, half vinyl esters/half amides, half esters of maleic anhydride vinyl pyrrolidone, acrylic acid, crotonic acid, mathacrylic acid, and combinations thereof.   
     
     
       2. An aerosol hair spray formulation according to claim 1 wherein the vinyl monomer is selected from the group consisting of acrylic acid, n-vinyl pyrrolidone, n-vinyl caprolactam, vinyl acetate, crotonic acid and mathacrylic acid. 
     
     
       3. An aerosol hair spray formulation according to claim 1 wherein the water-soluble polymer is selected from the group consisting of polyvinyl pyrrolidone, polyvinyl caprolactam, polyvinyl acetate, polyacrylates, polymethacrylates, and copolymers and terpolymers thereof. 
     
     
       4. An aerosol hair spray formulation according to claim 1 wherein the water-soluble polymer is selected from the group consisting of polyvinylpyrrolidone, copolymers of polyvinylpyrrolidone and methylmethacrylate, copolymers of polyvinylpyrrolidone and vinyl acetate, polyvinyl alcohol, copolymers of polyvinyl alcohol and crotonic acid, copolymers of polyvinyl alcohol and maleic anhydride, hydroxypropyl cellulose, hydroxypropyl guar gum, sodium polystyrene sulfonate, terpolymers of polyvinylpyrrolidone/ethylmethacrylate/methacrylic acid, and terpolymers of octylacrylamide/acrylate/butylaminoethyl methacrylate. 
     
     
       5. An aerosol hair spray formulation according to claim 1 wherein the propellant is dimethyl ether. 
     
     
       6. An aerosol hair spray formulation according to claim 1 wherein the propellant is 1,1-difluoroethane. 
     
     
       7. An aerosol hair spray formulation according to claim 1 wherein the propellant is a mixture containing 80 to 86 weight percent isobutane and 14 to 20 weight percent propane. 
     
     
       8. An aerosol hair spray formulation according to claim 1 wherein the combination of alcohol and propellant is 30 to 60 weight percent based on the total weight of the aerosol hair spray formulation.